| Educational Kits |
TW-DIY-5002 Temperature Meter
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Temperature Meter Kit - DIY
This Kit shows how much of electronics today can be contained in a single chip, the Intersil 7106. Commercial low cost digital volt meters are nothing more than this kit, some switches and passive components and a nice plastic case.
$29.88 | View Detail » |
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TW-DIY-5024 Logic Probe
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Logic Probe Kit - DIY
An important piece of equipment for test & measurement of digital equipment. Can be used in fault finding & testing as well as to assist in design work & to find out how digital equipment works. Switch for either TTL or CMOS. Our own modern design using a PUT. Includes detection circuit for very fast pulses. Gives visual (3 LEDs) and audio (piezo buzzer) response.
$9.99 | View Detail » |
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TW-DIY-5029 Combinantion Lock
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Combinantion Lock Kit - DIY
An introduction to a basic but fully working combination lock. Separate touch pad with 9 pads. Lock is reset if an incorrect digit is pressed. Relay is capable of switching 250V. 12V operation. Robust and versatile.
$24.99 | View Detail » |
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TW-DIY-5052 LED Flasher
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Five Ultra Bright LED Flasher Kit - DIY
This cmos VLSI single chip-on-board is designed for
electronic toy and warning light applications. Five LED's
flash on/off in a pseudo-random or sequential mode
depending on whether a switch is open or connected high.
Continuous flashing mode or toggle on/off is selectable by
another switch. The flash rate is controlled by a trimpot.
$9.99 | View Detail » |
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TW-DIY-5061 LED Meter
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3 1/2 Digital LED Panel Meter Kit - DIY
Kit 61 has been designed as a versatile 3 1/2 digit panel
meter with these considerations in mind. Also in this Kit
we have used small, monoblock capacitors rather than the
much bigger mylar or metallized types. This saves space
as well as making the meter look better.
$29.88 | View Detail » |
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TW-DIY-5073 PIC Clock
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Big PIC Clock Kit - DIY
The Big PIC Clock is based on a PIC16F84
microcontroller (uC.) The software in the uC allows for very accurate timekeeping. For visibility at a distance it uses 2.3Ô/57mm super large, hi-efficiency red LED displays for the hours and minutes and smaller 0.56Ô
LED displays for the seconds. The circuit incorporates a dimming feature so that at night the reduced ambient light is sensed and the display is dimmed.
$99.99 | View Detail » |
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TW-DIY-5110 Continuity Tester
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Continuity Tester Kit - DIY
A Continuity Tester is one of the most useful pieces of test
equipment to have. It is used for testing the electrical path
(continuity) between two points. It is more useful and
efficient than using a multimeter to do the same job.
$9.99 | View Detail » |
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TW-DIY-5134 Introduction to LCD's
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Introduction to LCD's Kit - DIY
Learn how to connect a 2x16 LCD to a PC parallel port. First this kit will show you how to write keystrokes from the PC keyboard to display on the LCD. It will show you how to process this data (rotate the string left and right.) All the code is provided. Second, there is an on-board DS1620 to measure temperature. The temperature is displayed in F or C. Just press a button to display either. With the DS1620 you may set breakpoints to turn a thermostat on/off. We provide all the code to do this. Once the DS1620 is programmed it may be removed and placed in another device for temperature control. Many web references are provided.
| View Detail » |
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TW-DIY-5141 Multi-mode Timer
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Multi-mode Timer Kit - DIY
Microcontroller-based timer with seven timer modes.
$29.88 | View Detail » |
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TW-DIY-5146 Message Recorder
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40 Second Message Recorder Kit - DIY
40 Second Message Recorder. This kit will take ISD DIP chips from ISD1700 series.
$29.88 | View Detail » |
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TW-DIY-5151 PROGRAMMER FOR SERIAL EEPROMs
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PROGRAMMER FOR SERIAL EEPROMs KIT - DIY
Serial eeproms are finding more and more use in
electronic devices these days. These small 8 pin
devices offer non-volatile data storage and require
minimal I/O lines to connect to them. This makes them
ideal in many microcontroller based applications.
$9.99 | View Detail » |
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TW-DIY-5156 Dual Hi/Lo Switched Relay Board
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Dual Hi/Lo Switched Relay Board - DIY
Two 12v PCB-mounted relays based around a ULN2003A high-voltage, high current relay driver. TTL compatible so the inputs can be connected to 5v. Lo 0-0.8vdc Hi 2.4-12v. A Hi or Lo to inputs will activate the relay.
$16.50 | View Detail » |
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TW-DIY-5158 Bi-Polar Stepper Motor Driver
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Bi-Polar Stepper Motor Driver - DIY
This kit will drive bi-polar stepper motors using externally supplied 5v levels for stepping and direction. This comes from software running on a PC. Uses IRFZ44 and MTP2955 MOSFETs
$29.88 | View Detail » |
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TW-DIY-5166 Bi-Directional DC Motor Speed Controller
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Bi-Directional DC Motor Speed Controller - DIY
This kit allows controlling the speed of a DC motor in both forward and reverse direction. The range of control is from fully OFF to fully ON in both directions. Uses MOSFETs IRF4905 and IRFZ44. Max voltage to run kit and motor is 32VDC.
$29.88 | View Detail » |
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TW-DIY-5179 UniPolar Stepper Motor Driver
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UniPolar Stepper Motor Driver - DIY
Standard circuit to drive unipolar stepper motors with 5, 6, or 8 wires. Uses 4 IRFZ44s. Can be operated in free-standing or PC-controlled mode. Uses standard ICs: 4013, 4030, and 4093. Separate power supply to ICs.
$24.95 | View Detail » |
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TW-DIY-5180 UHF Remote Control Kit
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Rolling Code 4-Channel UHF Remote Control Kit - DIY
This is one very clever remote control. With rolling code, it's close-to impossible
to electronically crack. With four channels, all either
latching or momentary operation, it's extremely versatile. With a
sensitive prebuilt receiver, it's long range. With up-to-16 keyring-size
transmitters, it's go-anywhere. And the kit even includes the keyring!
$78.75 | View Detail » |
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